Punjab Isn't Burning Yet. That's a Postponement, Not a Pardon.
Two NASA FIRMS frames, same date one year apart: Punjab ablaze on 12 October 2025, almost dark on 12 October 2026. Rain has been doing the scrubbing. But the VayuMet model gives the north a western disturbance through 17 October and then nothing — winds fall back to 8 km/h and stay there from 19 October, just as the harvest forces the burning window shut. ECMWF CAMS already has Delhi NCR touching 138 µg/m³ before dawn, nine times the WHO 24-hour guideline, and the aerosol is smoke, not dust.
Expiry Without Echo: A Rs 461 Crore Market Closed While India Watched the Monsoon Leave
India watched the southwest monsoon leave on 30 September and missed the other thing that ended that afternoon. RAINMUMBAI — the country's first exchange-traded weather derivative, and a Rs 461 crore market — reached its last expiry and settled at 2,243.05 mm. What it was, how it traded, who would have been on each side, how to watch the one still running, and why India's whole first season is 0.2% of the world market.
Thirteen Percent Down, a Hundred Stories Up: Monsoon 2026's Patchwork of Extremes
The southwest monsoon ended 13% below normal — a tidy national number that almost no one actually experienced. Resolve the same season to 724 districts and it runs from −91% to +104%, with 14 states holding both a drought-grade district and a flood-grade one. Uttar Pradesh finished +8% overall while containing both. Here are the two maps, and the four-act story of how a disastrous June turned into a merely disappointing season.
The Long Goodbye: A Fading Bay System Saves Its Worst for Uttar Pradesh
The Bay of Bengal system is 700 km inland and filling fast — Deep Depression over Chhattisgarh this morning, a spent low over Sitapur by 29 September. But the animation shows the trap: the rain band outruns the centre and swings onto Uttar Pradesh and the Himalayan foothills, where Very Heavy Rain and convective gusts of 80–90 km/h land on 25 and 26 September.
Rise and Fall of a Giant: A Bay of Bengal Depression in Motion
A Deep Depression sits off the north Andhra coast at 984 hPa this morning. Six frames from the VayuMet map, stitched into one animation, follow it west-northwest across Telangana and Vidarbha until it unwinds into a shallow low over Madhya Pradesh by 28 September. The dangerous days are 24 and 25 September, when Extremely Heavy Rain warnings fire across Telangana, Chhattisgarh, Odisha and Vidarbha and gusts touch 84 km/h.
Monsoon Exit Meets Resistance: Bay Storm Targets Andhra Coast by 25 September
IMD expects Southwest Monsoon withdrawal to commence from southwest Rajasthan on 19 September, and the VayuMet model agrees — pressure rising, ten straight days without a single rain alert. But the same run spins up a tropical system over the Andaman Sea around 20 September that tracks west-northwest toward the north Andhra–south Odisha coast, with landfall expected by 25 September and Extremely Heavy Rain driving inland over Bastar.
Wind Speed Is Not Wind Power — Forecasting India's Solar and Wind Resource Day by Day
Wind power rises with the cube of wind speed, so a turbine in a 54 km/h wind sees nearly six times the energy of one in 30 km/h. Sunlight on the ground is not panel output either — heat strips it back. What the resource quantities actually mean, how VayuMet computes wind power density, air density and temperature-derated PV for every district, what the ten-day energy meteogram shows, and where resource stops being generation.
Forecasting India's Smog Season — Why One Air Quality Number Cannot Tell You What You Are Breathing
Between mid-October and mid-November, northern India's air deteriorates through a combination of crop-residue smoke, festival emissions and a shallow winter inversion. A single Air Quality Index figure collapses all of that into one number — but dust and combustion smoke behave differently, clear differently, and call for different responses. How VayuMet separates them, how visibility is estimated from aerosol loading, and what the method cannot tell you.
Why India Doesn't Warm as One Country — Reading the District Climate Record, 1951–2025
A forecast only means something against a baseline. Seventy-five years of district records show 751 of 755 districts warmer than in 1951 — but the fastest region heats almost five times faster than the slowest, and a warming hole sits over the Indo-Gangetic Plain. What district climatology contains, why it makes a forecast interpretable, how VayuMet builds it, and where the record thins out.
Forty Millimetres Means Nothing — What an Impact-Based District Warning Actually Says
A rainfall figure is not a warning. The same 40 mm is routine in Kozhikode and a flood in Jaisalmer, and the same thunderstorm means avoid penetration to a dispatcher, lodging risk to a farmer and a steep ramp event to a grid scheduler. How VayuMet turns one district forecast into four different advisories, what the colour ladder means, and where the method stops.
Rain Is the Wrong Number for Sowing — What Soil Moisture and Evaporative Demand Actually Say
It rained 30 mm yesterday. Is the field ready to sow? Rainfall alone cannot answer that — the decision lives in the seed zone, where moisture, soil temperature and evaporative demand interact. How VayuMet computes sowing suitability, the FAO-56 water balance behind the irrigation call, the spray window, and why a 25 km grid is guidance rather than a soil sensor.
Out With the Monsoon, In With a Storm — A Bay of Bengal Low Brews Near 20 September
Pressure is rising and the monsoon trough is weakening over the northwest — classic Southwest Monsoon withdrawal precursors. Meanwhile a low-level circulation is organising near the Andaman Islands, with gusts near 79 km/h and a closed low developing over the Bay of Bengal by 18–22 September. Plus what's shaping up favourably for the Northeast Monsoon.
Trading Monsoon Risk: NCDEX Debuts RAINMUMBAI & RAINCHNNAI, India's First Weather Derivatives
NCDEX has listed India's first exchange-traded weather derivatives: RAINMUMBAI tracking the Southwest Monsoon over Mumbai, and RAINCHNNAI tracking the Northeast Monsoon over Chennai. What they are, who trades them, how the Cumulative Deviation Rainfall methodology works, the trade-offs versus crop insurance, and a live look at VayuMet's own 14-day CDR forecast for both contracts.
It Feels Like 46°C — A Muggy Heatwave Grips Punjab, Haryana and North Rajasthan Mid-Monsoon
Real-feel temperatures reach 45.8°C in Yamunanagar (Haryana) and 45.6°C in Gurdaspur (Punjab) as monsoon humidity stacks on top of a likely heatwave — bone-dry and blistering in the west, thick and suffocating in the east. The actual monsoon trough and rain sit far away over Chhattisgarh, Jharkhand, Bihar, and the Northeast, leaving the northwest hot, humid, and dry of rain alerts entirely.
RED Alert Over Ujjain Today — Then the Monsoon Trough Swings North Into a Foothills and Northeast India Deluge
Madhya Pradesh's Ujjain district is under a RED alert for Extremely Heavy Rain today, the peak of a rain band that already dropped Heavy Rain on Mizoram (06 Aug) and Delhi-NCR/Haryana (08 Aug). The model shows this fading by 12 Aug, but the trough re-forms firmly along the Himalayan foothills by 15–19 Aug, driving Heavy to locally Very Heavy Rain (peaks up to 164 mm) over Assam, Meghalaya, Tripura, and north Bengal, with Bihar joining late.
Severe Turbulence Dropped a Delhi-Bound Airbus 425 Feet in Seconds — the One Flight Hazard No Weather Station Can See
An Air India A320neo flying Phuket to Delhi lost and regained 425 feet of altitude in seconds at 36,000 ft over northern Madhya Pradesh on 4 August — an encounter that happened roughly 11 km above every rain gauge and weather station in India. The VayuMet cross-section along the track shows no clear-air turbulence signature at all, but cumulonimbus tops building to FL480, some 100 flight levels above the cruise altitude.
A Super El Niño and a Normal July — Forecast Failure, or a Monitoring Gap?
IMD forecast July at 94% of LPA; it verified at 101–104%, and the season is tracking 88% against a 90% call. So the forecast is not broken — but July was decided on a nine-day timescale by monsoon lows, and no ENSO index can speak to that. Why this is a monitoring problem, not a forecasting one.
Rainfall Axis Marches East as Gujarat's Depression Week Ends; UP–Bihar Plains in the Firing Line 02–04 Aug; Bay of Bengal Watch for 06–10 Aug
After the 29–31 July depression drenched Gujarat, the monsoon trough is pivoting rapidly east. Bihar and eastern UP face Extremely Heavy Rain on 02 Aug, central UP plains on 03–04 Aug. A new Bay of Bengal disturbance is worth watching for the second week of August.
The Valsad Trough Is Back — Monsoon Depression Tracks Westward Toward Gujarat; Same Offshore Zone That Delivered India's Third-Highest Daily Rainfall Now Under Watch
A well-marked depression (~994 hPa) over South Chhattisgarh at 29 Jul 1800 UTC is tracking westward toward the Gujarat coast. The P24P24 tendency shows pressure already falling −4 to −6 hPa over Gujarat and Maharashtra. The offshore trough re-activating off South Gujarat is the same zone that produced the 1,064 mm Valsad event on 22–23 July. Analysis with 4-panel chart and Valsad comparison.
Weather Intelligence in Aviation — Why It Matters for Safety and Cost
A storm you see three days out is a reroute; the one you don't is an emergency. Weather is an operational input, not a backdrop — the same early, accurate hazard picture keeps flights safe and cuts cost. Includes what the VayuMet Aviation Weather Dashboard provides for India and South Asia: a 10-day SigWx forecast (cumulonimbus, severe icing, jet stream, turbulence by flight level) plus live METAR, TAF and SIGMET.
1,064 mm in a Day — Anatomy of the Valsad Deluge, India's Third-Highest Daily Rainfall Ever | A VayuMet Analysis
Umbergaon (Valsad) logged ~1,064 mm in 24 hours — India's third-highest daily total on record. VayuMet decodes the drivers on annotated GFS 00 & 12 UTC charts: a well-marked low, a mid-level cyclonic circulation, deep ascent, and upper-level divergence that aligned vertically over Valsad by 23 July — with a surging Arabian Sea Low-Level Jet and near-zero steering locking the rain machine over one coastal belt for 36 hours.
Active Monsoon Low Drives Very Heavy Rain in Gujarat; Arabian Sea Low-Level Jet Surging; Rainfall Axis Shifting Eastward 27–31 July
An active monsoon low over northwest India is pulling a strongly enhanced Arabian Sea Low-Level Jet (+4 to +6 m/s above normal). Gujarat under Very Heavy Rain — The Dangs and Vadodara on 22 July; Banas Kantha and Patan on 23 July. Rainfall axis shifts east from 27 July: UP plains, West Bengal, and Odisha activating. No break monsoon signal through 31 July.
Break Monsoon Ending, Bay Low Develops ~19–20 July; Bihar and Jharkhand Revival Underway; Near-Nationwide Active Monsoon Likely 22–26 July
The break monsoon episode active since 11 July is in its final stage. A low-pressure area is developing over the north Bay of Bengal around 19–20 July, with Very Heavy Rain alerts for Bihar and Jharkhand. Near-nationwide active monsoon is likely 22–26 July as the Gangetic plains and central India revive.
Break Monsoon Conditions Confirmed for 11–15 July, Trough Anchored at Himalayan Foothills; Severe Heat Stress Over Northwest India; Fresh Bay Low Likely 16–20 July
All five VayuMet model diagnostics confirm a break monsoon episode for 11–15 July — trough at the Himalayan foothills, central India dry, northwest India under severe heat (+8 to +14°C above normal). A fresh low-pressure area is likely over the Bay of Bengal 16–20 July, bringing monsoon revival for eastern India.
Break Monsoon Watch Strengthens for 12–16 July as Monsoon Trough Shifts Toward Foothills, Activity Easing over W India, Active Spell Persists Over Northeast India
The 07 July VayuMet model run shows multi-variable confirmation of a break monsoon signal — MSLP trough, precipitation anomaly, 850 hPa wind, Tropical Easterly Jet, and temperature all pointing to a Weak to Break Monsoon episode from around 12 July. Active monsoon persists over Arunachal Pradesh, Mizoram, and sub-Himalayan West Bengal. Very Heavy Rain alerts for MP Malwa plateau (08–09 Jul) and Rajasthan Jhalawar (08–09 Jul).
India Monsoon Update 04 July 2026 — Low-Pressure System Over Odisha Shows Depression-Strength Winds 55–67 km/h, Monsoon Trough Shift Toward Foothills Likely 12–15 July
A well-organised low-pressure system over the Odisha coast shows gust winds of 55–67 km/h — consistent with Depression-strength criteria. IMD declared the Delhi monsoon onset on 02 July, three days ahead of the VayuMet model's first indicated date (05 July); all classical criteria (rain + wind + temperature) align simultaneously only on 07 July. Mumbai, Palghar, Raigarh and Thane face very heavy to extremely heavy rain today. Gujarat coast (Surat, Navsari, Valsad) and Maharashtra Vidarbha active 06–07 July.
India Monsoon 01 July 2026 — Low Pressure Area Active Northwest Bay, Depression Track Odisha–Chhattisgarh 04–06 July, Very Heavy Rain Gujarat Coast and Konkan 05 July
GFS 01 July 00Z confirms the Low Pressure Area is active today. Depression track refined slightly southward — core rainfall targets Odisha and Chhattisgarh 06 July. New detail: Gujarat coast (Narmada, Surat, Bharuch) flagged for very heavy rain 05 July. Rajasthan early signal 03 July. Tropical Easterly Jet at seasonal peak. Monsoon reached most of Central India and Uttarakhand as of 30 June.
India Monsoon 28 June 2026 — Low Pressure Area Northwest Bay 01 July, First Monsoon Depression Expected 04–05 July, Widespread Heavy Rain 03–07 July
GFS 28 June 00Z sharpens the Low Pressure Area signal from the 24 June run into a coherent Monsoon Depression track — NW Bay to Madhya Pradesh by 04–05 July. Extremely heavy rain alerts for Aravalli and Dungarpur on 04 July; Dadra & Nagar Haveli and Palghar on 07 July. Tropical Easterly Jet at strongest anomaly of the season. Monsoon to cover most of India except extreme Northwest by 05 July.
India Monsoon 24 June 2026 — Sub-seasonal Update: Maharashtra Done, Gujarat Entry, Subdued 24-28 June, Low Pressure Area over NW Bay Signal Heavy Rain Episode 29 June-02 July
Monsoon enters remaining Maharashtra and parts of Gujarat on 24 June. West Coast rain remains below Long Term Mean through 28 June — the low-level jet is still short of Gujarat. A Low Pressure Area developing over the Northwest Bay of Bengal around 01–02 July drives easterlies over Bihar–East Uttar Pradesh and a heavy rain episode over Andhra Pradesh, Chhattisgarh and Madhya Pradesh. New 200 hPa Tropical Easterly Jet analysis added — strengthening Trivandrum–Madagascar corridor is a bullish signal for sustained active monsoon into early July.
India Monsoon 17 June 2026 — Sub-seasonal Update: Arabian Sea Recovers, West Coast Advance Imminent
Arabian Sea anticyclonic disruption is weakening — southwesterly jet reorganising for a West Coast push around 20–22 June. Bay of Bengal remains vigorous. This update adds 2 m temperature and MSLP analysis alongside rainfall and 850 hPa wind, showing monsoon cooling across the declared belt and a deepening trough over northwest India.
India Monsoon 12 June 2026 — Sub-seasonal Outlook: Arabian Sea Stalls, Bay of Bengal Surges
A strong negative wind anomaly and anticyclonic disruption over the Arabian Sea is stalling monsoon's West Coast advance through ~16 June. The Bay of Bengal branch remains vigorous — heavy to extremely heavy rainfall expected over Northeast India, peaking 17–19 June. VayuMet GFS 10-day sub-seasonal analysis with rainfall and 850 hPa wind anomaly maps vs 1991–2020 Long Term Mean.
India Monsoon 2026 – June Update: IMD Declares Onset 4 June, Season Forecast Revised
IMD officially declared Kerala monsoon onset on 4 June — nine days after its April forecast of 26 May. Widespread heavy rainfall (Thiruvananthapuram 63 mm, Alappuzha 59 mm) confirmed all three onset criteria. CFSv2 JJAS May vs June Initial Conditions comparison shows a near-universal downgrade across South Peninsular, Central, and East & NE India for the full season, with NW hills the only exception.
Southwest Monsoon 2026: On the Threshold — A Comprehensive Multi-Model Assessment
IMD forecasts 92% of LPA — India's first below-normal monsoon since 2023. El Niño developing with 82–98% probability across all major agencies. VayuMet CFSv2 analysis reveals severe deficits across northwest and central India Jun–Aug; September outlook carries the widest uncertainty at this lead time. Comparative assessment of IMD, ECMWF SEAS5, NOAA/CPC, WMO/SASCOF-34, JMA and UK Met Office.
Gangetic Plains on Fire: Severe Heat Wave 22–29 May — Relief Storms Due 30 May
A powerful heat wave is gripping Punjab, Haryana, Delhi, UP and Bihar with temperatures 6–9°C above normal. Fazilka (Punjab) forecast to touch 48.7°C on 29 May — the peak day. A line of severe thunderstorms sweeping across Punjab, Haryana, Delhi and UP on 30 May is expected to bring dramatic relief, with convective gusts up to 95 km/h over Gurdaspur.
How the GFS Model Forecasts Rainfall in India – Accuracy, Limitations & How to Read the Maps
The GFS model is the backbone of VayuMet's short-range forecasts. This article explains how GFS works for the Indian subcontinent, where it excels, and where you should treat its output with caution.
India Southwest Monsoon 2026 – State-by-State Onset Dates & Forecast
When will the monsoon arrive in your state? Historical onset climatology compared against the 2026 CFSv2 seasonal outlook, with a state-by-state onset date table and tips for tracking on VayuMet.